Supplementary Material

Supplementary Figure 1 contains lung histologic analyses from newborn mice exposed to room air or hyperoxia for 14 days. Separate groups of mice were exposed to room air for 28 days or was exposed to 14 days of hyperoxia followed by exposure to room air for an additional 14 days. Formal morphometric analyses from 28 d mice are also shown.

Supplementary Figure 2 contains immunohistochemical analyses for Clara cell secretory protein (CCSP) in lung sections obtained from newborn mice exposed to room air for 28 days or exposed to hyperoxia for 14 days followed exposure to room air for an additional 14 days.